Interesting, my ethanol is holding at 9% solid. Right now it isn't a parameter for anything it is just there. Ill consider that if it starts getting screwy.

What was your 5v source from? I made my own circuit and threw capacitors on it so that the ripple is minimal.

I pulled 5V from the vipec accessory harness. I also tried the 5V rail that gets sent to some sensors as well. It was back in spetember, i cannot remember which. I just know when i left the car, it was wired to the vipec accessory harness.